Claim bundled theme copyright for contributors too.

[peterwilsoncc]

Updates the copyright notice for bundled themes to include contributors.

When contributing to WordPress, WordPress requires contributors license their code under the GPL. Unlike some projects there is no requirement to assign the copyright to WordPress.org or an associated entity.

By contributing code to WordPress, you grant its use under the GNU General Public License v2 (or later).

This updates the copyright claim in the bundled themes to indicate copyright is retained by contributors.

Trac ticket: https://core.trac.wordpress.org/ticket/61943

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Unlinked Accounts

The following contributors have not linked their GitHub and WordPress.org accounts: @josephahaden.

Contributors, please read how to link your accounts to ensure your work is properly credited in WordPress releases.

Core Committers: Use this line as a base for the props when committing in SVN:

Props peterwilsoncc, desrosj, sabernhardt, jorbin.

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

Test using WordPress Playground

The changes in this pull request can previewed and tested using a WordPress Playground instance.

WordPress Playground is an experimental project that creates a full WordPress instance entirely within the browser.

Some things to be aware of

• The Plugin and Theme Directories cannot be accessed within Playground.
• All changes will be lost when closing a tab with a Playground instance.
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  it's possible that the most recent build failed, or has not completed. Check the list of workflow runs to be sure.

For more details about these limitations and more, check out the Limitations page in the WordPress Playground documentation.

Test this pull request with WordPress Playground.

[desrosj]

Thanks @peterwilsoncc! I triple checked with @josephahaden, and neither of us have any concerns about this change.

[aaronjorbin]

This looks good to me. I think and contributors belongs at the end since it's not the contributors to WordPress.org or Automattic that own the copyright, but the contributors to the individual theme. Thanks Peter!

[peterwilsoncc]

@josephahaden Are you able to link your WordPress.org and GitHub profiles so we (committer contributors) can be sure to credit you correctly for the release? https://make.wordpress.org/core/2020/03/19/associating-github-accounts-with-wordpress-org-profiles/

[peterwilsoncc]

Merged r58958 / 99907ee